These are/were 2-3 y.o. trees grown in 4" rootmaker pots so they have great rootage from the start- some just potted up to the 6" a few weeks ago.

Heights on up to 24" with trunk sizes 3/16-1/4" on average with a few about 1/2". Other than minimal trimming they receive no training but are still wireable.

These are not really dormant yet being TX trees but should drop leaves soon. I ship with loose soil removed. Typical pricing: 10/$30, 5/17.50, or $4 each. I've probably got as many as you could want... ;^)

In my experience root maker pots do not produce good roots for bonsai.

My preference would still be to start from the beginning or purchase mature stock from an experienced grower of bonsai material. The time spent correcting faults simply isn't worth it, in my opinion. Your mileage may vary.

Rootmakers are fine when young. Best next step for me is field growing on a barrier, i.e., tile. Putting a 4" seedling into my fields is generally a death sentence. I grow mine out the same way Brent does, "chop and grow". I've been growing for my own purposes for over a decade.